code: def test_tcflush(self):
      termios.tcflush(self.fd, termios.TCIFLUSH)
      termios.tcflush(self.fd, termios.TCOFLUSH)
      termios.tcflush(self.fd, termios.TCIOFLUSH)
  
imports: import errno
  import os
  import sys
  import tempfile
  import unittest
  from test.support.import_helper import import_module
label_desc: Use image node_id 11 for calling the TestFunctions obj's underlying member method code with example usage: obj.test_tcflush() without return types